The department shall pay, from the Aeronautics Account to the Transportation Planning and Development Account in the State Transportation Fund, a sum equal to the pro rata share of the comprehensive transportation duties attributable to aviation planning and research, as determined by the Director of Transportation.
Source:
Section 21682.5, https://leginfo.legislature.ca.gov/faces/codes_displaySection.xhtml?lawCode=PUC§ionNum=21682.5..